it is not a taliban gathering, but only a funeral for a local farmer. but as marines approach another group of mud farmhouses, they come under fire. >> right now, we're taking effective fire from the southeast. >> reporter: lieutenant mock spreads out his men, several marines dive into a rooftop. from here, they can see silhouettes of men hiding and shooting. >> he is popping out the right-hand side of the wall. >> yeah, that is where i spotted him. >> reporter: it is not clear if this is the same taliban that attacked the base. >> they think there are about 20 or 30 hiding, yards from here. some with rpgs, some with assault rifles, they called in air support, right now they're trying to flush them out, drive them into the open. >> what side of the compound? the navy corpmen and a few afghan soldiers advance closer to the taliban. but as soon as he goes in the house, an explosion, but it was not a bomb. the afghan soldiers u.s. allies fired an rpg, without warning. it knocked him down, but he is okay. >> came through the doorway, got thrown on my butt,